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Archives for Portable jammer

Portable jammer

Portable jammer Portable jammer and signal removal for cell phone, WiFi, and GPS signals Portable jammer, signal removal Portable Signal Jammer circuit 20M Radius. High Power Signal Jammer Portable powerful and portable solution to completely block a nearby cell phone,  WiFi, and GPS signals. Can be used around the world. Strong and effective, this portable […]

Intercom switch circuit

Intercom switch circuit Intercom switch circuit Two line intercom plus a telephone changeover switch Click here for the circuit diagram. The circuit presented here can be used for connecting, The circuit presented here can be used for connecting two telephones in parallel

How to a solar cell

How to a solar cell Solar cell / photovoltaic cells, is a semiconductor device consisting of a pn junction diode, where, in the presence of sunlight to create electrical energy, because it has the function of the tool can convert sunlight directly into electricity. Solar cells / photovoltaic cells made in 1839 by Edmund Becquerel, […]

Make a simple power amplifier-BC547 – 1watts

Make a simple power amplifier-BC547 – 1watts This circuit is probably my most used AF power amplifier circuit in my own homebrew equipment.This circuit will deliver the full 1 watt output with about 400mV RMS of drive voltage, but for other input levels you can set the gain by adjusting the value of R8. The […]

Stereo Audio Amplifiers

Stereo Audio Amplifiers circuit using stk439 Stereo Audio Amplifiers circuit using stk439 Stereo Audio Amplifiers R 1 ……….. 2 K 2 R 2,4 ……… 220 K R 3 ……….. 390 K R 5 ……….. 100 R 6 ……….. 120 R 7 ……….. 12 K R 8 ……….. 10 C 1 ……….. 470 pF C 2 […]

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